Well we bought a new 90 gal tank and our having some issues with building a stand to hold it. The specs of the tank are
48" length, 18"width, and 23"height.
I was wanting the height of the stand to be around 24" so I would still be able to clean the tank without a chair to stand on. Does anybody know of a place that has plans for building stands? Or any ideas of how to build a strong stand.

Also if we were to put this tank upstairs would we need to reinforce the floor joists?

this site has other useful things too...i would have used it to build the stand for my 55 gal but i found the Wal-Mart Stand to be of good quality plus inexpensive...plus they had a matching hood for $0.50!!!

The only problem I see with that design is you are putting all the weight of your tank onto the screws holding the top frame to the vertical support studs. I would rather see a cripple stud in there with the vertical supports or a half lap joint where the vertical meets the horizontal. JMHO